/*
 moxl - Modular XML Library
 Copyright (c) 2007, Malcolm Sparks

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package moxl.xpath.parser.types;

public abstract class AbstractXPathValue
{

	public double getValueAsDouble()
	{
		throw new UnsupportedOperationException("This value cannot be represented as a number as it is a " + getTypeName() + ".");
	}

	public boolean getValueAsBoolean()
	{
		throw new UnsupportedOperationException("This value cannot be represented as a boolean as it is a " + getTypeName() + ".");
	}

	public void negate()
	{
		throw new UnsupportedOperationException("This value cannot be negated as it is a " + getTypeName() + ".");
	}

	protected abstract String getTypeName();

	public String getValueAsString()
	{
		throw new UnsupportedOperationException("This value cannot be represented as a string as it is a " + getTypeName() + ".");
	}

}
